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Merge tpm 2017/11/15 v1

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Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2017-11-15-1' into staging

Merge tpm 2017/11/15 v1

# gpg: Signature made Wed 15 Nov 2017 11:51:47 GMT
# gpg:                using RSA key 0x75AD65802A0B4211
# gpg: Good signature from "Stefan Berger <stefanb@linux.vnet.ibm.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B818 B9CA DF90 89C2 D5CE  C66B 75AD 6580 2A0B 4211

* remotes/stefanberger/tags/pull-tpm-2017-11-15-1:
  tpm_tis: Return 0 for every register in case of failure mode
  tpm_tis: Return TPM_VERSION_UNSPEC in case of BE failure
  tpm-emulator: protect concurrent ctrl_chr access
  specs: Extend TPM spec with TPM emulator description

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-11-16 11:34:24 +00:00
commit 8048082f7a
3 changed files with 112 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

44
hw/tpm/tpm_emulator.c
View file

@ -71,15 +71,21 @@ typedef struct TPMEmulator {
ptm_cap caps; /* capabilities of the TPM */
uint8_t cur_locty_number; /* last set locality */
Error *migration_blocker;
QemuMutex mutex;
} TPMEmulator;
static int tpm_emulator_ctrlcmd(CharBackend *dev, unsigned long cmd, void *msg,
static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg,
size_t msg_len_in, size_t msg_len_out)
{
CharBackend *dev = &tpm->ctrl_chr;
uint32_t cmd_no = cpu_to_be32(cmd);
ssize_t n = sizeof(uint32_t) + msg_len_in;
uint8_t *buf = NULL;
int ret = -1;
qemu_mutex_lock(&tpm->mutex);
buf = g_alloca(n);
memcpy(buf, &cmd_no, sizeof(cmd_no));
@ -87,17 +93,21 @@ static int tpm_emulator_ctrlcmd(CharBackend *dev, unsigned long cmd, void *msg,
n = qemu_chr_fe_write_all(dev, buf, n);
if (n <= 0) {
return -1;
goto end;
}
if (msg_len_out != 0) {
n = qemu_chr_fe_read_all(dev, msg, msg_len_out);
if (n <= 0) {
return -1;
goto end;
}
}
return 0;
ret = 0;
end:
qemu_mutex_unlock(&tpm->mutex);
return ret;
}
static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_emu,
@ -154,7 +164,7 @@ static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number,
DPRINTF("setting locality : 0x%x", locty_number);
loc.u.req.loc = locty_number;
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_SET_LOCALITY, &loc,
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_LOCALITY, &loc,
sizeof(loc), sizeof(loc)) < 0) {
error_setg(errp, "tpm-emulator: could not set locality : %s",
strerror(errno));
@ -202,8 +212,8 @@ error:
static int tpm_emulator_probe_caps(TPMEmulator *tpm_emu)
{
DPRINTF("%s", __func__);
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_GET_CAPABILITY,
&tpm_emu->caps, 0, sizeof(tpm_emu->caps)) < 0) {
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_CAPABILITY,
&tpm_emu->caps, 0, sizeof(tpm_emu->caps)) < 0) {
error_report("tpm-emulator: probing failed : %s", strerror(errno));
return -1;
}
@ -254,8 +264,8 @@ static int tpm_emulator_startup_tpm(TPMBackend *tb)
ptm_res res;
DPRINTF("%s", __func__);
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_INIT, &init, sizeof(init),
sizeof(init)) < 0) {
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_INIT, &init, sizeof(init),
sizeof(init)) < 0) {
error_report("tpm-emulator: could not send INIT: %s",
strerror(errno));
goto err_exit;
@ -278,7 +288,7 @@ static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb)
ptm_est est;
DPRINTF("%s", __func__);
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_GET_TPMESTABLISHED, &est,
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_TPMESTABLISHED, &est,
0, sizeof(est)) < 0) {
error_report("tpm-emulator: Could not get the TPM established flag: %s",
strerror(errno));
@ -302,7 +312,7 @@ static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb,
}
reset_est.u.req.loc = tpm_emu->cur_locty_number;
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_RESET_TPMESTABLISHED,
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_RESET_TPMESTABLISHED,
&reset_est, sizeof(reset_est),
sizeof(reset_est)) < 0) {
error_report("tpm-emulator: Could not reset the establishment bit: %s",
@ -330,7 +340,7 @@ static void tpm_emulator_cancel_cmd(TPMBackend *tb)
return;
}
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_CANCEL_TPM_CMD, &res, 0,
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_CANCEL_TPM_CMD, &res, 0,
sizeof(res)) < 0) {
error_report("tpm-emulator: Could not cancel command: %s",
strerror(errno));
@ -378,8 +388,8 @@ static int tpm_emulator_prepare_data_fd(TPMEmulator *tpm_emu)
qemu_chr_fe_set_msgfds(&tpm_emu->ctrl_chr, fds + 1, 1);
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_SET_DATAFD, &res, 0,
sizeof(res)) || res != 0) {
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_DATAFD, &res, 0,
sizeof(res)) < 0 || res != 0) {
error_report("tpm-emulator: Failed to send CMD_SET_DATAFD: %s",
strerror(errno));
goto err_exit;
@ -501,6 +511,7 @@ static void tpm_emulator_inst_init(Object *obj)
DPRINTF("%s", __func__);
tpm_emu->options = g_new0(TPMEmulatorOptions, 1);
tpm_emu->cur_locty_number = ~0;
qemu_mutex_init(&tpm_emu->mutex);
}
/*
@ -510,8 +521,7 @@ static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
{
ptm_res res;
if (tpm_emulator_ctrlcmd(&tpm_emu->ctrl_chr, CMD_SHUTDOWN, &res, 0,
sizeof(res)) < 0) {
if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SHUTDOWN, &res, 0, sizeof(res)) < 0) {
error_report("tpm-emulator: Could not cleanly shutdown the TPM: %s",
strerror(errno));
} else if (res != 0) {
@ -536,6 +546,8 @@ static void tpm_emulator_inst_finalize(Object *obj)
migrate_del_blocker(tpm_emu->migration_blocker);
error_free(tpm_emu->migration_blocker);
}
qemu_mutex_destroy(&tpm_emu->mutex);
}
static void tpm_emulator_class_init(ObjectClass *klass, void *data)

6
hw/tpm/tpm_tis.c
View file

@ -545,7 +545,7 @@ static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr,
uint8_t v;
if (tpm_backend_had_startup_error(s->be_driver)) {
return val;
return 0;
}
switch (offset) {
@ -1008,6 +1008,10 @@ TPMVersion tpm_tis_get_tpm_version(Object *obj)
{
TPMState *s = TPM(obj);
if (tpm_backend_had_startup_error(s->be_driver)) {
return TPM_VERSION_UNSPEC;
}
return tpm_backend_get_tpm_version(s->be_driver);
}